38AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.311 DECEMBER 2001Figure A3.4. Filling Density for Cryogenic Liquids Except Hydrogen.Pressure control valve setting (maximum start-to-discharge pressure, kPa (psig.)Maximum permitted filling density (percent byweight)AirArgonNitrogenOxygenHeliumNeon310.3 (45)82.51337610812.5109517 (75)80.31307410512.5104724 (105)78.41277210312.51001172 (170)76.21227010012.5921585.8 (230)75.1119699812.5852034 (295)73.3115689612.5772482 (360)70.7113659312.53103 (450)65.9111619112.53723 (540)62.9107588812.54309 (625)60.1104558612.5Design Service Temperature (degrees F)-320-320-320-320-452-411(degrees C)-196-196-196-196-269-246Figure A3.5. Filling Density for Cryogenic Liquids of Hydrogen.Column 1Column 2Design service temperatureMinus 253 degrees C (-423 degreesF) or colderMaximum permitted filling density, basedon cylinder capacity at -253 degrees C (-423 degrees F)(see note)6.7 percentThe pressure control valve must be designed and set to limit thepressure in the cylinder to not more than117 kPa (17 psig)NOTE:The filling density for hydrogen, cryogenic liquid, is defined as the percent ratio of the weight of lading ina package to the weight of water that the packaging will hold at -253 degrees C (-423 degrees F). The volume of thepackaging at -253 degrees C (-423 degrees F) is determined in cubic inches. The volume is converted to pounds ofwater (1 pound of water = 27.737 cubic inches). Each cylinder must be constructed, insulated, and maintained sothat the total rate of venting must not be over 30 standard cubic feet (SCF) of hydrogen per hour duringtransportation.A3.3.2.6. Mandatory Color-Code Identification. Exact color-code identification of any material contained in acompressed gas cylinder is mandatory and must meet MIL-STD-101.A3.3.2.7. Foreign Cylinders. A foreign cylinder may not be offered for military airlift unless manufactured,inspected, and tested according to 49 CFR, Part 178, or a copy of the competent authority approval of the nationmanufacturing the cylinder accompanies the shipment. All other requirements of this manual also apply.HA3.3.2.8. Unregulated Compressed Gases. Compressed gasses in the following items are not regulated:-Inflated tires, when inflated to a pressure not greater than its rated inflation pressure.-Inflated balls used for sports.-Carbonated beverages.-Refrigerating machines, including dehumidifiers, air conditioners, and components thereof such asprecharged tubing containing 12 kg (25 pounds) or less of nonflammable liquefied gas.HA3.3.2.9. Previously Authorized Cylinders. Cylinders marked with the prefix "ICC" (i.e. ICC-4BA240) areauthorized in place of cylinders required by this manual with a "DOT" prefix. The cylinders must comply with allother applicable specification requirements for DOT cylinders.HA3.3.3. Class 3.A3.3.3.1. Combustible Liquids. The requirements in this manual do not apply to materials classed as combustibleliquid. See attachment 14 for marking requirements.